{"api_version":"1","generated_at":"2026-10-18T05:20:38+00:00","cve":"CVE-2026-98236","urls":{"html":"https://cve.report/CVE-2026-98236","api":"https://cve.report/api/cve/CVE-2026-98236.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98236","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98236"},"summary":{"title":"net: wwan: mhi_wwan_mbim: check skb_copy_bits() return value","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wwan: mhi_wwan_mbim: check skb_copy_bits() return value\n\nmhi_mbim_rx() ignores the return value of skb_copy_bits() when it\ncopies each datagram out of the NTB.  The datagram offset and length\ncome from the DPE, which is only checked to lie within the NTB\nitself, so a modem can point a datagram outside the received skb.\nThe copy then fails and the freshly allocated skbn is passed to\nnetif_rx() with its uninitialized contents still in place, leaking\nkernel heap memory into the network stack.\n\nFree the skb and account an error when the copy fails.\n\n\nVerified in a QEMU guest with a fault injector pointing a DPE\noutside the received NTB: the copy fails, and the unpatched driver\nhands the uninitialized skbn to the network stack (observed as\n\"unknown protocol\" on bytes that were never written).  With this\ncheck the failed datagram is dropped and counted as an rx error.\n\nChanges in v2: factor the free-and-count sequence out into\nmhi_mbim_rx_drop(), shared with the unknown-protocol path, as\nsuggested by Loic Poulain.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-06 09:18:11","updated_at":"2026-10-06 09:18:11"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/350fd3125ee26b5243935fd9e2b4d162ffba430a","name":"https://git.kernel.org/stable/c/350fd3125ee26b5243935fd9e2b4d162ffba430a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/02eba5f36d20283f144f75d47f0354a85e4f78f0","name":"https://git.kernel.org/stable/c/02eba5f36d20283f144f75d47f0354a85e4f78f0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7","name":"https://git.kernel.org/stable/c/dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/31550d585589fde1ae95bf7f7a8188b2d2fdf1c7","name":"https://git.kernel.org/stable/c/31550d585589fde1ae95bf7f7a8188b2d2fdf1c7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/650af68435eaee783824457d2ef78cc5c03c1e88","name":"https://git.kernel.org/stable/c/650af68435eaee783824457d2ef78cc5c03c1e88","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7e98216e9da08b79e07a514d2a4f7646f8c9ccb9","name":"https://git.kernel.org/stable/c/7e98216e9da08b79e07a514d2a4f7646f8c9ccb9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/298659c3677bf622afa9d77549cb4a967f9541e9","name":"https://git.kernel.org/stable/c/298659c3677bf622afa9d77549cb4a967f9541e9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98236","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98236","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa730a9905b7b079ef2fffdab7f15dbb842f5c7c 650af68435eaee783824457d2ef78cc5c03c1e88 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa730a9905b7b079ef2fffdab7f15dbb842f5c7c 350fd3125ee26b5243935fd9e2b4d162ffba430a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa730a9905b7b079ef2fffdab7f15dbb842f5c7c dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa730a9905b7b079ef2fffdab7f15dbb842f5c7c 298659c3677bf622afa9d77549cb4a967f9541e9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa730a9905b7b079ef2fffdab7f15dbb842f5c7c 02eba5f36d20283f144f75d47f0354a85e4f78f0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa730a9905b7b079ef2fffdab7f15dbb842f5c7c 7e98216e9da08b79e07a514d2a4f7646f8c9ccb9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa730a9905b7b079ef2fffdab7f15dbb842f5c7c 31550d585589fde1ae95bf7f7a8188b2d2fdf1c7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.222 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.54 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.8 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc4 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98236","cve":"CVE-2026-98236","epss":"0.001800000","percentile":"0.069190000","score_date":"2026-10-06","updated_at":"2026-10-07 00:14:55"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/wwan/mhi_wwan_mbim.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"650af68435eaee783824457d2ef78cc5c03c1e88","status":"affected","version":"aa730a9905b7b079ef2fffdab7f15dbb842f5c7c","versionType":"git"},{"lessThan":"350fd3125ee26b5243935fd9e2b4d162ffba430a","status":"affected","version":"aa730a9905b7b079ef2fffdab7f15dbb842f5c7c","versionType":"git"},{"lessThan":"dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7","status":"affected","version":"aa730a9905b7b079ef2fffdab7f15dbb842f5c7c","versionType":"git"},{"lessThan":"298659c3677bf622afa9d77549cb4a967f9541e9","status":"affected","version":"aa730a9905b7b079ef2fffdab7f15dbb842f5c7c","versionType":"git"},{"lessThan":"02eba5f36d20283f144f75d47f0354a85e4f78f0","status":"affected","version":"aa730a9905b7b079ef2fffdab7f15dbb842f5c7c","versionType":"git"},{"lessThan":"7e98216e9da08b79e07a514d2a4f7646f8c9ccb9","status":"affected","version":"aa730a9905b7b079ef2fffdab7f15dbb842f5c7c","versionType":"git"},{"lessThan":"31550d585589fde1ae95bf7f7a8188b2d2fdf1c7","status":"affected","version":"aa730a9905b7b079ef2fffdab7f15dbb842f5c7c","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/wwan/mhi_wwan_mbim.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.222","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.54","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.54","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.8","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc4","versionStartIncluding":"5.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wwan: mhi_wwan_mbim: check skb_copy_bits() return value\n\nmhi_mbim_rx() ignores the return value of skb_copy_bits() when it\ncopies each datagram out of the NTB.  The datagram offset and length\ncome from the DPE, which is only checked to lie within the NTB\nitself, so a modem can point a datagram outside the received skb.\nThe copy then fails and the freshly allocated skbn is passed to\nnetif_rx() with its uninitialized contents still in place, leaking\nkernel heap memory into the network stack.\n\nFree the skb and account an error when the copy fails.\n\n\nVerified in a QEMU guest with a fault injector pointing a DPE\noutside the received NTB: the copy fails, and the unpatched driver\nhands the uninitialized skbn to the network stack (observed as\n\"unknown protocol\" on bytes that were never written).  With this\ncheck the failed datagram is dropped and counted as an rx error.\n\nChanges in v2: factor the free-and-count sequence out into\nmhi_mbim_rx_drop(), shared with the unknown-protocol path, as\nsuggested by Loic Poulain."}],"providerMetadata":{"dateUpdated":"2026-10-06T08:45:08.600Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/650af68435eaee783824457d2ef78cc5c03c1e88"},{"url":"https://git.kernel.org/stable/c/350fd3125ee26b5243935fd9e2b4d162ffba430a"},{"url":"https://git.kernel.org/stable/c/dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7"},{"url":"https://git.kernel.org/stable/c/298659c3677bf622afa9d77549cb4a967f9541e9"},{"url":"https://git.kernel.org/stable/c/02eba5f36d20283f144f75d47f0354a85e4f78f0"},{"url":"https://git.kernel.org/stable/c/7e98216e9da08b79e07a514d2a4f7646f8c9ccb9"},{"url":"https://git.kernel.org/stable/c/31550d585589fde1ae95bf7f7a8188b2d2fdf1c7"}],"title":"net: wwan: mhi_wwan_mbim: check skb_copy_bits() return value","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98236","datePublished":"2026-10-06T08:45:08.600Z","dateReserved":"2026-09-25T10:25:14.329Z","dateUpdated":"2026-10-06T08:45:08.600Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-06 09:18:11","lastModifiedDate":"2026-10-06 09:18:11","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98236","Ordinal":"1","Title":"net: wwan: mhi_wwan_mbim: check skb_copy_bits() return value","CVE":"CVE-2026-98236","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98236","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wwan: mhi_wwan_mbim: check skb_copy_bits() return value\n\nmhi_mbim_rx() ignores the return value of skb_copy_bits() when it\ncopies each datagram out of the NTB.  The datagram offset and length\ncome from the DPE, which is only checked to lie within the NTB\nitself, so a modem can point a datagram outside the received skb.\nThe copy then fails and the freshly allocated skbn is passed to\nnetif_rx() with its uninitialized contents still in place, leaking\nkernel heap memory into the network stack.\n\nFree the skb and account an error when the copy fails.\n\n\nVerified in a QEMU guest with a fault injector pointing a DPE\noutside the received NTB: the copy fails, and the unpatched driver\nhands the uninitialized skbn to the network stack (observed as\n\"unknown protocol\" on bytes that were never written).  With this\ncheck the failed datagram is dropped and counted as an rx error.\n\nChanges in v2: factor the free-and-count sequence out into\nmhi_mbim_rx_drop(), shared with the unknown-protocol path, as\nsuggested by Loic Poulain.","Type":"Description","Title":"net: wwan: mhi_wwan_mbim: check skb_copy_bits() return value"}]}}}